My first encounter with the world of cyber-criminals occurred through a watering hole attack campaign many years ago. I visited a Persian website and discovered that it was downloading malware onto visitors’ browsers. I promptly contacted the site administrator, who informed me that they had no technical knowledge of the issue. It became apparent that…
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I have heard this many times over the course of the last several years: someone is experiencing a heavy DDoS attack on their website. When I ask them what type of attack they are experiencing, the answer is usually that the bad guys are sending them thousands or even millions of POST requests. When I…
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DDoS (distributed denial of service) and DoS (denial of service) attacks can be broadly classified into three categories based on the layers of the OSI model they target: network layer (Layer 3), transport layer (Layer 4), and application layer (Layer 7). Layer 3 and Layer 4 attacks are typically less complex–even though that they might…
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The web application firewall (WAF) is a security tool used to guard against unwanted access to web applications. It is often a security device that sits on top of a web server and guards against threats from the internet or from beyond the network perimeter. Unlike Layer 3 (Network) and Layer 4 (Transport) firewalls, which…
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Canvas fingerprinting, and Zombie cookie trackers are nothing new; however, these methods are improved and have become notoriously effective over the time. Recently, a study revealed that one in every four 10,000 most visited websites on the internet uses canvas fingerprinting to track the visitors with up to 99.9% accuracy. The tracking attempt to collect…
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Για πολλά χρόνια, Έχω χρησιμοποιήσει με ζήλο το Suhosin με οποιεσδήποτε υλοποιήσεις php5 σε διακομιστές ιστού Apache2 ή PHP-FPM Nginx για να υπερασπιστώ την ένεση SQL και άλλες κοινές επιθέσεις ιστού. Στην πραγματικότητα, PHP5 ήταν τόσο καταστροφική, τόσο όσον αφορά τη βασική του ασφάλεια, and its functions and modules that I could have never conceived using it…
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